Pileus Git - ~andy/linux/blob - drivers/net/wireless/mwifiex/usb.c

   1 /*
   2  * Marvell Wireless LAN device driver: USB specific handling
   3  *
   4  * Copyright (C) 2012, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "main.h"
  21 #include "usb.h"
  22
  23 #define USB_VERSION     "1.0"
  24
  25 static struct mwifiex_if_ops usb_ops;
  26 static struct semaphore add_remove_card_sem;
  27 static struct usb_card_rec *usb_card;
  28
  29 static struct usb_device_id mwifiex_usb_table[] = {
  30         /* 8797 */
  31         {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
  32         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
  33                                        USB_CLASS_VENDOR_SPEC,
  34                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  35         /* 8897 */
  36         {USB_DEVICE(USB8XXX_VID, USB8897_PID_1)},
  37         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8897_PID_2,
  38                                        USB_CLASS_VENDOR_SPEC,
  39                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  40         { }     /* Terminating entry */
  41 };
  42
  43 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
  44
  45 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
  46
  47 /* This function handles received packet. Necessary action is taken based on
  48  * cmd/event/data.
  49  */
  50 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
  51                             struct sk_buff *skb, u8 ep)
  52 {
  53         struct device *dev = adapter->dev;
  54         u32 recv_type;
  55         __le32 tmp;
  56         int ret;
  57
  58         if (adapter->hs_activated)
  59                 mwifiex_process_hs_config(adapter);
  60
  61         if (skb->len < INTF_HEADER_LEN) {
  62                 dev_err(dev, "%s: invalid skb->len\n", __func__);
  63                 return -1;
  64         }
  65
  66         switch (ep) {
  67         case MWIFIEX_USB_EP_CMD_EVENT:
  68                 dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
  69                 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
  70                 recv_type = le32_to_cpu(tmp);
  71                 skb_pull(skb, INTF_HEADER_LEN);
  72
  73                 switch (recv_type) {
  74                 case MWIFIEX_USB_TYPE_CMD:
  75                         if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
  76                                 dev_err(dev, "CMD: skb->len too large\n");
  77                                 ret = -1;
  78                                 goto exit_restore_skb;
  79                         } else if (!adapter->curr_cmd) {
  80                                 dev_dbg(dev, "CMD: no curr_cmd\n");
  81                                 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
  82                                         mwifiex_process_sleep_confirm_resp(
  83                                                         adapter, skb->data,
  84                                                         skb->len);
  85                                         ret = 0;
  86                                         goto exit_restore_skb;
  87                                 }
  88                                 ret = -1;
  89                                 goto exit_restore_skb;
  90                         }
  91
  92                         adapter->curr_cmd->resp_skb = skb;
  93                         adapter->cmd_resp_received = true;
  94                         break;
  95                 case MWIFIEX_USB_TYPE_EVENT:
  96                         if (skb->len < sizeof(u32)) {
  97                                 dev_err(dev, "EVENT: skb->len too small\n");
  98                                 ret = -1;
  99                                 goto exit_restore_skb;
 100                         }
 101                         skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
 102                         adapter->event_cause = le32_to_cpu(tmp);
 103                         dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
 104
 105                         if (skb->len > MAX_EVENT_SIZE) {
 106                                 dev_err(dev, "EVENT: event body too large\n");
 107                                 ret = -1;
 108                                 goto exit_restore_skb;
 109                         }
 110
 111                         memcpy(adapter->event_body, skb->data +
 112                                MWIFIEX_EVENT_HEADER_LEN, skb->len);
 113
 114                         adapter->event_received = true;
 115                         adapter->event_skb = skb;
 116                         break;
 117                 default:
 118                         dev_err(dev, "unknown recv_type %#x\n", recv_type);
 119                         return -1;
 120                 }
 121                 break;
 122         case MWIFIEX_USB_EP_DATA:
 123                 dev_dbg(dev, "%s: EP_DATA\n", __func__);
 124                 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
 125                         dev_err(dev, "DATA: skb->len too large\n");
 126                         return -1;
 127                 }
 128                 skb_queue_tail(&adapter->usb_rx_data_q, skb);
 129                 adapter->data_received = true;
 130                 break;
 131         default:
 132                 dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
 133                 return -1;
 134         }
 135
 136         return -EINPROGRESS;
 137
 138 exit_restore_skb:
 139         /* The buffer will be reused for further cmds/events */
 140         skb_push(skb, INTF_HEADER_LEN);
 141
 142         return ret;
 143 }
 144
 145 static void mwifiex_usb_rx_complete(struct urb *urb)
 146 {
 147         struct urb_context *context = (struct urb_context *)urb->context;
 148         struct mwifiex_adapter *adapter = context->adapter;
 149         struct sk_buff *skb = context->skb;
 150         struct usb_card_rec *card;
 151         int recv_length = urb->actual_length;
 152         int size, status;
 153
 154         if (!adapter || !adapter->card) {
 155                 pr_err("mwifiex adapter or card structure is not valid\n");
 156                 return;
 157         }
 158
 159         card = (struct usb_card_rec *)adapter->card;
 160         if (card->rx_cmd_ep == context->ep)
 161                 atomic_dec(&card->rx_cmd_urb_pending);
 162         else
 163                 atomic_dec(&card->rx_data_urb_pending);
 164
 165         if (recv_length) {
 166                 if (urb->status || (adapter->surprise_removed)) {
 167                         dev_err(adapter->dev,
 168                                 "URB status is failed: %d\n", urb->status);
 169                         /* Do not free skb in case of command ep */
 170                         if (card->rx_cmd_ep != context->ep)
 171                                 dev_kfree_skb_any(skb);
 172                         goto setup_for_next;
 173                 }
 174                 if (skb->len > recv_length)
 175                         skb_trim(skb, recv_length);
 176                 else
 177                         skb_put(skb, recv_length - skb->len);
 178
 179                 atomic_inc(&adapter->rx_pending);
 180                 status = mwifiex_usb_recv(adapter, skb, context->ep);
 181
 182                 dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
 183                         recv_length, status);
 184                 if (status == -EINPROGRESS) {
 185                         queue_work(adapter->workqueue, &adapter->main_work);
 186
 187                         /* urb for data_ep is re-submitted now;
 188                          * urb for cmd_ep will be re-submitted in callback
 189                          * mwifiex_usb_recv_complete
 190                          */
 191                         if (card->rx_cmd_ep == context->ep)
 192                                 return;
 193                 } else {
 194                         atomic_dec(&adapter->rx_pending);
 195                         if (status == -1)
 196                                 dev_err(adapter->dev,
 197                                         "received data processing failed!\n");
 198
 199                         /* Do not free skb in case of command ep */
 200                         if (card->rx_cmd_ep != context->ep)
 201                                 dev_kfree_skb_any(skb);
 202                 }
 203         } else if (urb->status) {
 204                 if (!adapter->is_suspended) {
 205                         dev_warn(adapter->dev,
 206                                  "Card is removed: %d\n", urb->status);
 207                         adapter->surprise_removed = true;
 208                 }
 209                 dev_kfree_skb_any(skb);
 210                 return;
 211         } else {
 212                 /* Do not free skb in case of command ep */
 213                 if (card->rx_cmd_ep != context->ep)
 214                         dev_kfree_skb_any(skb);
 215
 216                 /* fall through setup_for_next */
 217         }
 218
 219 setup_for_next:
 220         if (card->rx_cmd_ep == context->ep)
 221                 size = MWIFIEX_RX_CMD_BUF_SIZE;
 222         else
 223                 size = MWIFIEX_RX_DATA_BUF_SIZE;
 224
 225         mwifiex_usb_submit_rx_urb(context, size);
 226
 227         return;
 228 }
 229
 230 static void mwifiex_usb_tx_complete(struct urb *urb)
 231 {
 232         struct urb_context *context = (struct urb_context *)(urb->context);
 233         struct mwifiex_adapter *adapter = context->adapter;
 234         struct usb_card_rec *card = adapter->card;
 235
 236         dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
 237
 238         if (context->ep == card->tx_cmd_ep) {
 239                 dev_dbg(adapter->dev, "%s: CMD\n", __func__);
 240                 atomic_dec(&card->tx_cmd_urb_pending);
 241                 adapter->cmd_sent = false;
 242         } else {
 243                 dev_dbg(adapter->dev, "%s: DATA\n", __func__);
 244                 atomic_dec(&card->tx_data_urb_pending);
 245                 mwifiex_write_data_complete(adapter, context->skb, 0,
 246                                             urb->status ? -1 : 0);
 247         }
 248
 249         queue_work(adapter->workqueue, &adapter->main_work);
 250
 251         return;
 252 }
 253
 254 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
 255 {
 256         struct mwifiex_adapter *adapter = ctx->adapter;
 257         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 258
 259         if (card->rx_cmd_ep != ctx->ep) {
 260                 ctx->skb = dev_alloc_skb(size);
 261                 if (!ctx->skb) {
 262                         dev_err(adapter->dev,
 263                                 "%s: dev_alloc_skb failed\n", __func__);
 264                         return -ENOMEM;
 265                 }
 266         }
 267
 268         usb_fill_bulk_urb(ctx->urb, card->udev,
 269                           usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
 270                           size, mwifiex_usb_rx_complete, (void *)ctx);
 271
 272         if (card->rx_cmd_ep == ctx->ep)
 273                 atomic_inc(&card->rx_cmd_urb_pending);
 274         else
 275                 atomic_inc(&card->rx_data_urb_pending);
 276
 277         if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
 278                 dev_err(adapter->dev, "usb_submit_urb failed\n");
 279                 dev_kfree_skb_any(ctx->skb);
 280                 ctx->skb = NULL;
 281
 282                 if (card->rx_cmd_ep == ctx->ep)
 283                         atomic_dec(&card->rx_cmd_urb_pending);
 284                 else
 285                         atomic_dec(&card->rx_data_urb_pending);
 286
 287                 return -1;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static void mwifiex_usb_free(struct usb_card_rec *card)
 294 {
 295         int i;
 296
 297         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 298                 usb_kill_urb(card->rx_cmd.urb);
 299
 300         usb_free_urb(card->rx_cmd.urb);
 301         card->rx_cmd.urb = NULL;
 302
 303         if (atomic_read(&card->rx_data_urb_pending))
 304                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 305                         if (card->rx_data_list[i].urb)
 306                                 usb_kill_urb(card->rx_data_list[i].urb);
 307
 308         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 309                 usb_free_urb(card->rx_data_list[i].urb);
 310                 card->rx_data_list[i].urb = NULL;
 311         }
 312
 313         for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
 314                 usb_free_urb(card->tx_data_list[i].urb);
 315                 card->tx_data_list[i].urb = NULL;
 316         }
 317
 318         usb_free_urb(card->tx_cmd.urb);
 319         card->tx_cmd.urb = NULL;
 320
 321         return;
 322 }
 323
 324 /* This function probes an mwifiex device and registers it. It allocates
 325  * the card structure, initiates the device registration and initialization
 326  * procedure by adding a logical interface.
 327  */
 328 static int mwifiex_usb_probe(struct usb_interface *intf,
 329                              const struct usb_device_id *id)
 330 {
 331         struct usb_device *udev = interface_to_usbdev(intf);
 332         struct usb_host_interface *iface_desc = intf->cur_altsetting;
 333         struct usb_endpoint_descriptor *epd;
 334         int ret, i;
 335         struct usb_card_rec *card;
 336         u16 id_vendor, id_product, bcd_device, bcd_usb;
 337
 338         card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 339         if (!card)
 340                 return -ENOMEM;
 341
 342         id_vendor = le16_to_cpu(udev->descriptor.idVendor);
 343         id_product = le16_to_cpu(udev->descriptor.idProduct);
 344         bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
 345         bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
 346         pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
 347                  id_vendor, id_product, bcd_device);
 348
 349         /* PID_1 is used for firmware downloading only */
 350         switch (id_product) {
 351         case USB8797_PID_1:
 352         case USB8897_PID_1:
 353                 card->usb_boot_state = USB8XXX_FW_DNLD;
 354                 break;
 355         case USB8797_PID_2:
 356         case USB8897_PID_2:
 357                 card->usb_boot_state = USB8XXX_FW_READY;
 358                 break;
 359         default:
 360                 pr_warning("unknown id_product %#x\n", id_product);
 361                 card->usb_boot_state = USB8XXX_FW_DNLD;
 362                 break;
 363         }
 364
 365         card->udev = udev;
 366         card->intf = intf;
 367
 368         pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
 369                  udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
 370                  udev->descriptor.bDeviceSubClass,
 371                  udev->descriptor.bDeviceProtocol);
 372
 373         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 374                 epd = &iface_desc->endpoint[i].desc;
 375                 if (usb_endpoint_dir_in(epd) &&
 376                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
 377                     usb_endpoint_xfer_bulk(epd)) {
 378                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
 379                                  le16_to_cpu(epd->wMaxPacketSize),
 380                                  epd->bEndpointAddress);
 381                         card->rx_cmd_ep = usb_endpoint_num(epd);
 382                         atomic_set(&card->rx_cmd_urb_pending, 0);
 383                 }
 384                 if (usb_endpoint_dir_in(epd) &&
 385                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
 386                     usb_endpoint_xfer_bulk(epd)) {
 387                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
 388                                  le16_to_cpu(epd->wMaxPacketSize),
 389                                  epd->bEndpointAddress);
 390                         card->rx_data_ep = usb_endpoint_num(epd);
 391                         atomic_set(&card->rx_data_urb_pending, 0);
 392                 }
 393                 if (usb_endpoint_dir_out(epd) &&
 394                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
 395                     usb_endpoint_xfer_bulk(epd)) {
 396                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
 397                                  le16_to_cpu(epd->wMaxPacketSize),
 398                                  epd->bEndpointAddress);
 399                         card->tx_data_ep = usb_endpoint_num(epd);
 400                         atomic_set(&card->tx_data_urb_pending, 0);
 401                 }
 402                 if (usb_endpoint_dir_out(epd) &&
 403                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
 404                     usb_endpoint_xfer_bulk(epd)) {
 405                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
 406                                  le16_to_cpu(epd->wMaxPacketSize),
 407                                  epd->bEndpointAddress);
 408                         card->tx_cmd_ep = usb_endpoint_num(epd);
 409                         atomic_set(&card->tx_cmd_urb_pending, 0);
 410                         card->bulk_out_maxpktsize =
 411                                         le16_to_cpu(epd->wMaxPacketSize);
 412                 }
 413         }
 414
 415         usb_set_intfdata(intf, card);
 416
 417         ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
 418                                MWIFIEX_USB);
 419         if (ret) {
 420                 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
 421                 usb_reset_device(udev);
 422                 kfree(card);
 423                 return ret;
 424         }
 425
 426         usb_get_dev(udev);
 427
 428         return 0;
 429 }
 430
 431 /* Kernel needs to suspend all functions separately. Therefore all
 432  * registered functions must have drivers with suspend and resume
 433  * methods. Failing that the kernel simply removes the whole card.
 434  *
 435  * If already not suspended, this function allocates and sends a
 436  * 'host sleep activate' request to the firmware and turns off the traffic.
 437  */
 438 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
 439 {
 440         struct usb_card_rec *card = usb_get_intfdata(intf);
 441         struct mwifiex_adapter *adapter;
 442         int i;
 443
 444         if (!card || !card->adapter) {
 445                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 446                 return 0;
 447         }
 448         adapter = card->adapter;
 449
 450         if (unlikely(adapter->is_suspended))
 451                 dev_warn(adapter->dev, "Device already suspended\n");
 452
 453         mwifiex_enable_hs(adapter);
 454
 455         /* 'is_suspended' flag indicates device is suspended.
 456          * It must be set here before the usb_kill_urb() calls. Reason
 457          * is in the complete handlers, urb->status(= -ENOENT) and
 458          * this flag is used in combination to distinguish between a
 459          * 'suspended' state and a 'disconnect' one.
 460          */
 461         adapter->is_suspended = true;
 462
 463         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 464                 usb_kill_urb(card->rx_cmd.urb);
 465
 466         if (atomic_read(&card->rx_data_urb_pending))
 467                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 468                         if (card->rx_data_list[i].urb)
 469                                 usb_kill_urb(card->rx_data_list[i].urb);
 470
 471         for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
 472                 if (card->tx_data_list[i].urb)
 473                         usb_kill_urb(card->tx_data_list[i].urb);
 474
 475         if (card->tx_cmd.urb)
 476                 usb_kill_urb(card->tx_cmd.urb);
 477
 478         return 0;
 479 }
 480
 481 /* Kernel needs to suspend all functions separately. Therefore all
 482  * registered functions must have drivers with suspend and resume
 483  * methods. Failing that the kernel simply removes the whole card.
 484  *
 485  * If already not resumed, this function turns on the traffic and
 486  * sends a 'host sleep cancel' request to the firmware.
 487  */
 488 static int mwifiex_usb_resume(struct usb_interface *intf)
 489 {
 490         struct usb_card_rec *card = usb_get_intfdata(intf);
 491         struct mwifiex_adapter *adapter;
 492         int i;
 493
 494         if (!card || !card->adapter) {
 495                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 496                 return 0;
 497         }
 498         adapter = card->adapter;
 499
 500         if (unlikely(!adapter->is_suspended)) {
 501                 dev_warn(adapter->dev, "Device already resumed\n");
 502                 return 0;
 503         }
 504
 505         /* Indicate device resumed. The netdev queue will be resumed only
 506          * after the urbs have been re-submitted
 507          */
 508         adapter->is_suspended = false;
 509
 510         if (!atomic_read(&card->rx_data_urb_pending))
 511                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 512                         mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 513                                                   MWIFIEX_RX_DATA_BUF_SIZE);
 514
 515         if (!atomic_read(&card->rx_cmd_urb_pending)) {
 516                 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 517                 if (card->rx_cmd.skb)
 518                         mwifiex_usb_submit_rx_urb(&card->rx_cmd,
 519                                                   MWIFIEX_RX_CMD_BUF_SIZE);
 520         }
 521
 522         /* Disable Host Sleep */
 523         if (adapter->hs_activated)
 524                 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
 525                                                    MWIFIEX_BSS_ROLE_ANY),
 526                                   MWIFIEX_ASYNC_CMD);
 527
 528         return 0;
 529 }
 530
 531 static void mwifiex_usb_disconnect(struct usb_interface *intf)
 532 {
 533         struct usb_card_rec *card = usb_get_intfdata(intf);
 534
 535         if (!card) {
 536                 pr_err("%s: card is NULL\n", __func__);
 537                 return;
 538         }
 539
 540         mwifiex_usb_free(card);
 541
 542         if (card->adapter) {
 543                 struct mwifiex_adapter *adapter = card->adapter;
 544
 545                 if (!adapter->priv_num)
 546                         return;
 547
 548                 dev_dbg(adapter->dev, "%s: removing card\n", __func__);
 549                 mwifiex_remove_card(adapter, &add_remove_card_sem);
 550         }
 551
 552         usb_set_intfdata(intf, NULL);
 553         usb_put_dev(interface_to_usbdev(intf));
 554         kfree(card);
 555         usb_card = NULL;
 556
 557         return;
 558 }
 559
 560 static struct usb_driver mwifiex_usb_driver = {
 561         .name = "mwifiex_usb",
 562         .probe = mwifiex_usb_probe,
 563         .disconnect = mwifiex_usb_disconnect,
 564         .id_table = mwifiex_usb_table,
 565         .suspend = mwifiex_usb_suspend,
 566         .resume = mwifiex_usb_resume,
 567 };
 568
 569 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
 570 {
 571         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 572         int i;
 573
 574         card->tx_cmd.adapter = adapter;
 575         card->tx_cmd.ep = card->tx_cmd_ep;
 576
 577         card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 578         if (!card->tx_cmd.urb) {
 579                 dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
 580                 return -ENOMEM;
 581         }
 582
 583         card->tx_data_ix = 0;
 584
 585         for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
 586                 card->tx_data_list[i].adapter = adapter;
 587                 card->tx_data_list[i].ep = card->tx_data_ep;
 588
 589                 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
 590                 if (!card->tx_data_list[i].urb) {
 591                         dev_err(adapter->dev,
 592                                 "tx_data_list[] urb allocation failed\n");
 593                         return -ENOMEM;
 594                 }
 595         }
 596
 597         return 0;
 598 }
 599
 600 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
 601 {
 602         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 603         int i;
 604
 605         card->rx_cmd.adapter = adapter;
 606         card->rx_cmd.ep = card->rx_cmd_ep;
 607
 608         card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 609         if (!card->rx_cmd.urb) {
 610                 dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
 611                 return -ENOMEM;
 612         }
 613
 614         card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 615         if (!card->rx_cmd.skb) {
 616                 dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
 617                 return -ENOMEM;
 618         }
 619
 620         if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
 621                 return -1;
 622
 623         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 624                 card->rx_data_list[i].adapter = adapter;
 625                 card->rx_data_list[i].ep = card->rx_data_ep;
 626
 627                 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
 628                 if (!card->rx_data_list[i].urb) {
 629                         dev_err(adapter->dev,
 630                                 "rx_data_list[] urb allocation failed\n");
 631                         return -1;
 632                 }
 633                 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 634                                               MWIFIEX_RX_DATA_BUF_SIZE))
 635                         return -1;
 636         }
 637
 638         return 0;
 639 }
 640
 641 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 642                                    u32 *len, u8 ep, u32 timeout)
 643 {
 644         struct usb_card_rec *card = adapter->card;
 645         int actual_length, ret;
 646
 647         if (!(*len % card->bulk_out_maxpktsize))
 648                 (*len)++;
 649
 650         /* Send the data block */
 651         ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
 652                            *len, &actual_length, timeout);
 653         if (ret) {
 654                 dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
 655                 return ret;
 656         }
 657
 658         *len = actual_length;
 659
 660         return ret;
 661 }
 662
 663 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 664                                   u32 *len, u8 ep, u32 timeout)
 665 {
 666         struct usb_card_rec *card = adapter->card;
 667         int actual_length, ret;
 668
 669         /* Receive the data response */
 670         ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
 671                            *len, &actual_length, timeout);
 672         if (ret) {
 673                 dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
 674                 return ret;
 675         }
 676
 677         *len = actual_length;
 678
 679         return ret;
 680 }
 681
 682 /* This function write a command/data packet to card. */
 683 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
 684                                     struct sk_buff *skb,
 685                                     struct mwifiex_tx_param *tx_param)
 686 {
 687         struct usb_card_rec *card = adapter->card;
 688         struct urb_context *context;
 689         u8 *data = (u8 *)skb->data;
 690         struct urb *tx_urb;
 691
 692         if (adapter->is_suspended) {
 693                 dev_err(adapter->dev,
 694                         "%s: not allowed while suspended\n", __func__);
 695                 return -1;
 696         }
 697
 698         if (adapter->surprise_removed) {
 699                 dev_err(adapter->dev, "%s: device removed\n", __func__);
 700                 return -1;
 701         }
 702
 703         if (ep == card->tx_data_ep &&
 704             atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
 705                 return -EBUSY;
 706         }
 707
 708         dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
 709
 710         if (ep == card->tx_cmd_ep) {
 711                 context = &card->tx_cmd;
 712         } else {
 713                 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
 714                         card->tx_data_ix = 0;
 715                 context = &card->tx_data_list[card->tx_data_ix++];
 716         }
 717
 718         context->adapter = adapter;
 719         context->ep = ep;
 720         context->skb = skb;
 721         tx_urb = context->urb;
 722
 723         usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
 724                           data, skb->len, mwifiex_usb_tx_complete,
 725                           (void *)context);
 726
 727         tx_urb->transfer_flags |= URB_ZERO_PACKET;
 728
 729         if (ep == card->tx_cmd_ep)
 730                 atomic_inc(&card->tx_cmd_urb_pending);
 731         else
 732                 atomic_inc(&card->tx_data_urb_pending);
 733
 734         if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
 735                 dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
 736                 if (ep == card->tx_cmd_ep) {
 737                         atomic_dec(&card->tx_cmd_urb_pending);
 738                 } else {
 739                         atomic_dec(&card->tx_data_urb_pending);
 740                         if (card->tx_data_ix)
 741                                 card->tx_data_ix--;
 742                         else
 743                                 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
 744                 }
 745
 746                 return -1;
 747         } else {
 748                 if (ep == card->tx_data_ep &&
 749                     atomic_read(&card->tx_data_urb_pending) ==
 750                                                         MWIFIEX_TX_DATA_URB)
 751                         return -ENOSR;
 752         }
 753
 754         return -EINPROGRESS;
 755 }
 756
 757 /* This function register usb device and initialize parameter. */
 758 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
 759 {
 760         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 761
 762         card->adapter = adapter;
 763         adapter->dev = &card->udev->dev;
 764         usb_card = card;
 765
 766         switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
 767         case USB8897_PID_1:
 768         case USB8897_PID_2:
 769                 strcpy(adapter->fw_name, USB8897_DEFAULT_FW_NAME);
 770                 break;
 771         case USB8797_PID_1:
 772         case USB8797_PID_2:
 773         default:
 774                 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
 775                 break;
 776         }
 777
 778         return 0;
 779 }
 780
 781 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
 782 {
 783         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 784
 785         card->adapter = NULL;
 786 }
 787
 788 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
 789                                     struct mwifiex_fw_image *fw)
 790 {
 791         int ret = 0;
 792         u8 *firmware = fw->fw_buf, *recv_buff;
 793         u32 retries = USB8XXX_FW_MAX_RETRY, dlen;
 794         u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
 795         struct fw_data *fwdata;
 796         struct fw_sync_header sync_fw;
 797         u8 check_winner = 1;
 798
 799         if (!firmware) {
 800                 dev_err(adapter->dev,
 801                         "No firmware image found! Terminating download\n");
 802                 ret = -1;
 803                 goto fw_exit;
 804         }
 805
 806         /* Allocate memory for transmit */
 807         fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
 808         if (!fwdata)
 809                 goto fw_exit;
 810
 811         /* Allocate memory for receive */
 812         recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
 813         if (!recv_buff)
 814                 goto cleanup;
 815
 816         do {
 817                 /* Send pseudo data to check winner status first */
 818                 if (check_winner) {
 819                         memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
 820                         dlen = 0;
 821                 } else {
 822                         /* copy the header of the fw_data to get the length */
 823                         memcpy(&fwdata->fw_hdr, &firmware[tlen],
 824                                sizeof(struct fw_header));
 825
 826                         dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
 827                         dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
 828                         tlen += sizeof(struct fw_header);
 829
 830                         memcpy(fwdata->data, &firmware[tlen], dlen);
 831
 832                         fwdata->seq_num = cpu_to_le32(fw_seqnum);
 833                         tlen += dlen;
 834                 }
 835
 836                 /* If the send/receive fails or CRC occurs then retry */
 837                 while (retries--) {
 838                         u8 *buf = (u8 *)fwdata;
 839                         u32 len = FW_DATA_XMIT_SIZE;
 840
 841                         /* send the firmware block */
 842                         ret = mwifiex_write_data_sync(adapter, buf, &len,
 843                                                 MWIFIEX_USB_EP_CMD_EVENT,
 844                                                 MWIFIEX_USB_TIMEOUT);
 845                         if (ret) {
 846                                 dev_err(adapter->dev,
 847                                         "write_data_sync: failed: %d\n", ret);
 848                                 continue;
 849                         }
 850
 851                         buf = recv_buff;
 852                         len = FW_DNLD_RX_BUF_SIZE;
 853
 854                         /* Receive the firmware block response */
 855                         ret = mwifiex_read_data_sync(adapter, buf, &len,
 856                                                 MWIFIEX_USB_EP_CMD_EVENT,
 857                                                 MWIFIEX_USB_TIMEOUT);
 858                         if (ret) {
 859                                 dev_err(adapter->dev,
 860                                         "read_data_sync: failed: %d\n", ret);
 861                                 continue;
 862                         }
 863
 864                         memcpy(&sync_fw, recv_buff,
 865                                sizeof(struct fw_sync_header));
 866
 867                         /* check 1st firmware block resp for highest bit set */
 868                         if (check_winner) {
 869                                 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
 870                                         dev_warn(adapter->dev,
 871                                                  "USB is not the winner %#x\n",
 872                                                  sync_fw.cmd);
 873
 874                                         /* returning success */
 875                                         ret = 0;
 876                                         goto cleanup;
 877                                 }
 878
 879                                 dev_dbg(adapter->dev,
 880                                         "USB is the winner, start to download FW\n");
 881
 882                                 check_winner = 0;
 883                                 break;
 884                         }
 885
 886                         /* check the firmware block response for CRC errors */
 887                         if (sync_fw.cmd) {
 888                                 dev_err(adapter->dev,
 889                                         "FW received block with CRC %#x\n",
 890                                         sync_fw.cmd);
 891                                 ret = -1;
 892                                 continue;
 893                         }
 894
 895                         retries = USB8XXX_FW_MAX_RETRY;
 896                         break;
 897                 }
 898                 fw_seqnum++;
 899         } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
 900
 901 cleanup:
 902         dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen);
 903
 904         kfree(recv_buff);
 905         kfree(fwdata);
 906
 907         if (retries)
 908                 ret = 0;
 909 fw_exit:
 910         return ret;
 911 }
 912
 913 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
 914                         struct mwifiex_fw_image *fw)
 915 {
 916         int ret;
 917         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 918
 919         if (card->usb_boot_state == USB8XXX_FW_DNLD) {
 920                 ret = mwifiex_prog_fw_w_helper(adapter, fw);
 921                 if (ret)
 922                         return -1;
 923
 924                 /* Boot state changes after successful firmware download */
 925                 if (card->usb_boot_state == USB8XXX_FW_DNLD)
 926                         return -1;
 927         }
 928
 929         ret = mwifiex_usb_rx_init(adapter);
 930         if (!ret)
 931                 ret = mwifiex_usb_tx_init(adapter);
 932
 933         return ret;
 934 }
 935
 936 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
 937 {
 938         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 939
 940         skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
 941         if ((ep == card->rx_cmd_ep) &&
 942             (!atomic_read(&card->rx_cmd_urb_pending)))
 943                 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
 944                                           MWIFIEX_RX_CMD_BUF_SIZE);
 945
 946         return;
 947 }
 948
 949 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
 950                                        struct sk_buff *skb)
 951 {
 952         atomic_dec(&adapter->rx_pending);
 953         mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
 954
 955         return 0;
 956 }
 957
 958 static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter)
 959 {
 960         atomic_dec(&adapter->rx_pending);
 961
 962         return 0;
 963 }
 964
 965 /* This function wakes up the card. */
 966 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
 967 {
 968         /* Simulation of HS_AWAKE event */
 969         adapter->pm_wakeup_fw_try = false;
 970         adapter->pm_wakeup_card_req = false;
 971         adapter->ps_state = PS_STATE_AWAKE;
 972
 973         return 0;
 974 }
 975
 976 static struct mwifiex_if_ops usb_ops = {
 977         .register_dev =         mwifiex_register_dev,
 978         .unregister_dev =       mwifiex_unregister_dev,
 979         .wakeup =               mwifiex_pm_wakeup_card,
 980         .wakeup_complete =      mwifiex_pm_wakeup_card_complete,
 981
 982         /* USB specific */
 983         .dnld_fw =              mwifiex_usb_dnld_fw,
 984         .cmdrsp_complete =      mwifiex_usb_cmd_event_complete,
 985         .event_complete =       mwifiex_usb_cmd_event_complete,
 986         .data_complete =        mwifiex_usb_data_complete,
 987         .host_to_card =         mwifiex_usb_host_to_card,
 988 };
 989
 990 /* This function initializes the USB driver module.
 991  *
 992  * This initiates the semaphore and registers the device with
 993  * USB bus.
 994  */
 995 static int mwifiex_usb_init_module(void)
 996 {
 997         int ret;
 998
 999         pr_debug("Marvell USB8797 Driver\n");
1000
1001         sema_init(&add_remove_card_sem, 1);
1002
1003         ret = usb_register(&mwifiex_usb_driver);
1004         if (ret)
1005                 pr_err("Driver register failed!\n");
1006         else
1007                 pr_debug("info: Driver registered successfully!\n");
1008
1009         return ret;
1010 }
1011
1012 /* This function cleans up the USB driver.
1013  *
1014  * The following major steps are followed in .disconnect for cleanup:
1015  *      - Resume the device if its suspended
1016  *      - Disconnect the device if connected
1017  *      - Shutdown the firmware
1018  *      - Unregister the device from USB bus.
1019  */
1020 static void mwifiex_usb_cleanup_module(void)
1021 {
1022         if (!down_interruptible(&add_remove_card_sem))
1023                 up(&add_remove_card_sem);
1024
1025         if (usb_card && usb_card->adapter) {
1026                 struct mwifiex_adapter *adapter = usb_card->adapter;
1027                 int i;
1028
1029                 /* In case driver is removed when asynchronous FW downloading is
1030                  * in progress
1031                  */
1032                 wait_for_completion(&adapter->fw_load);
1033
1034 #ifdef CONFIG_PM
1035                 if (adapter->is_suspended)
1036                         mwifiex_usb_resume(usb_card->intf);
1037 #endif
1038                 for (i = 0; i < adapter->priv_num; i++)
1039                         if ((GET_BSS_ROLE(adapter->priv[i]) ==
1040                              MWIFIEX_BSS_ROLE_STA) &&
1041                             adapter->priv[i]->media_connected)
1042                                 mwifiex_deauthenticate(adapter->priv[i], NULL);
1043
1044                 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
1045                                                           MWIFIEX_BSS_ROLE_ANY),
1046                                          MWIFIEX_FUNC_SHUTDOWN);
1047         }
1048
1049         usb_deregister(&mwifiex_usb_driver);
1050 }
1051
1052 module_init(mwifiex_usb_init_module);
1053 module_exit(mwifiex_usb_cleanup_module);
1054
1055 MODULE_AUTHOR("Marvell International Ltd.");
1056 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1057 MODULE_VERSION(USB_VERSION);
1058 MODULE_LICENSE("GPL v2");
1059 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1060 MODULE_FIRMWARE(USB8897_DEFAULT_FW_NAME);